PACK TRIP OFF Light on the P5 Panel Is On.
Figure 103 (Sheet 3)
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MAINTENANCE MANUAL
CONNECT CONNECTOR D534
58 THERE IS A SHORT TO GROUND(D540 OR D10866) TO THE DUCT IN THE OVERHEAT DETECTION OVHT SWITCH, S3 (S6 OR S0990). CIRCUIT BETWEEN THE AIR
CONDITIONING ACCESSORY UNIT, TIONING ACCESSORY UNIT, M324, M324, AND THE OVERHEAT FROM THE E3-2 SHELF. SWITCHES.
MEASURE THE RESISTANCE REPAIR THE WIRING FROM PIN 33 AT CONNECTOR D458B(WDM 21-63-01).(D458A) ON THE E3-2 SHELF TO INSTALL THE AIR CONDI-STRUCTURE GROUND TIONING ACCESSORY UNIT, M324 (WDM 21-63-01). (AMM 21-51-06/401).
NOTE: IF THE RESISTANCE IS
LESS THAN 50 OHMS,
THERE IS A SHORT TO
GROUND IN THE WIRING
BETWEEN THE P5-10
MODULE AND THE M324
MODULE.
61 THERE IS A SHORT IN THE WIRING. REPAIR THE WIRING (WDM 21-63-01).
INSTALL THE AIR CONDI-TIONING ACCESSORY UNIT, M324 (AMM 21-51-06/401).
MEASURE THE RESISTANCE FROM PIN 29 (PIN 25) AT CONNECTOR D646 (D680) TO STRUCTURE GROUND (WDM 21-63-01).
IS THERE AN OPEN CIRCUIT BETWEEN THE P5-10 MODULE AND THE M324 MODULE?
NO
PACK TRIP OFF Light on the P5 Panel Is On.
Figure 103 (Sheet 4)
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E95079
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737-300/400/500
MAINTENANCE MANUAL
FROM SHEET 2
(BLOCK 5)
YES YES6
EXAMINE THE PRIMARY AND
62 CLEAN THE HEAT EXCHANGERS
SECONDARY HEAT EXCHANGERS IN (AMM 21-51-21/701).
THE APPLICABLE PACK FOR DIRT
OR OTHER UNWANTED MATERIAL
THAT CAN CAUSE A BLOCKAGE OF
AIR FLOW THROUGH THE HEAT
EXCHANGERS.
DO THE HEAT EXCHANGERS HAVE CONTAMINATION?
NO NO YES
7 OPERATE THE APPLICABLE
37 REPLACE THE TURBO FAN
PACK (AMM 21-00-00/201). VALVE (AMM 21-52-71/401).
IS THE TURBO FAN ON? OPERATE THE PACKS
(AMM 21-00-00/201).
NOTE: WHEN THE TURBO FAN IS
IS THE TURBO FAN ON?
ON, THERE IS AIR FLOW
OUT OF THE RAM AIR
NO
EXHAUST DUCT.
YES
YES
8 OPERATE THE APPLICABLE
65 REPLACE THE AIR CYCLE
PACK (AMM 21-00-00/201).MACHINE (AMM 21-51-11/401).
IS THE AIR CYCLE MACHINE
SEIZED?
NO NO YES
9 MOVE THE APPLICABLE
38 DISCONNECT CONNECTOR D524
TEMPERATURE SELECTOR ON THE (D522) FROM THE AIR MIX VALVE,
P5 PANEL TO THE "MANUAL COOL" V23 (V22)(WDM 21-61-01).
POSITION. MOVE THE CONT CABIN
(PASS CABIN) TEMPERATURE
____IF THE AIR MIX VALVE ISNOTE:
SELECTOR TO "MANUAL COOL" AND
OK, THEN THE POSITION
MAKE A VOLTAGE MEASUREMENT
INDICATOR WILL MOVE TO
FOR 115V AC AT PIN 1.
THE "COLD" POSITION.
IS THERE 115V AC AT PIN 1?
LOOK AT THE APPLICABLE
NO
"AIR MIX VALVE" POSITION INDICATOR ON THE P5 PANEL.
DOES THE MIX VALVE SEE SHEET 6 POSITION INDICATOR MOVE TO (BLOCK 39) THE "COLD" POSITION?
YES SEE SHEET 7
(BLOCK 10)
PACK TRIP OFF Light on the P5 Panel Is On.
Figure 103 (Sheet 5)
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